Collapsible core



March 5, 1929. O KUHLKE 1,704,291

COLLAPSIBLE CORE Filed Sept. 2, 1924 2 Sheets-Sheet 1 A TTORNEY.

March 5, 1929. Q J KUHLKE 1,704,291

, COLLAPSIBLE CORE Filed Sept. 2, 1924 2 Sheets-Sheet 2 ,iim

INVENTOR.

Orra J. Ira/mks BYO.

ATTO

Patented Mar. 5, 1929.

UNITED STATES 1,704,291 PATENT OFFICE.

OTTO J. KUHLKE, OF AKRON, OHIO, ASSIGNOR TO THEKUHLIE EACHINE COMPANY OF AKRON, OHIO, A- CORPORATION OF OHIO.

COLLAPSIIBLE CORE.

Application filed September 2, 1924. Serial No. 735,265.

This invention relates to collapsible cores or forms for the building of pneumatic automobile tires of the type characterized by the 1 ct, that the sections are provided with collapsing mechanism to withdraw them to the interior of the tire bead, all of the mechanism being permanently secured to the shaft.

The object of the present invention is to lo improve upon collapsible cores of this type b y increasing the ease and rapidity of operation of the core, and by so constructing the core that in collapsed position, it will occupy space then other cores of asimilftl type, and to facilitate the removal of the the suction move to the same side of the control or fixed section, whereas in the former patent, the core sections moved in opposite directions. 3y this construction I am enabled to utilize the oblique hinge con striwtion without interfering with certain supporting and collapsing mechanism at the o the mice.

A further objot oi the invention is to 1'. rm-t a: tin-m of collapsing mechanism in which n. group of the core set 511115 is notable in a cin'ved pat-lilo a. position out:- side of O1 intersecting the original core plane, l" "ing a key section in fixed position, so that after such movement has taken place, the group may be collapsed icz-i'ng vitli the key SQCtlOIl. isoudei' aspects of the present invention are covered in my application, Serial No. 747,913, filed November 5, 1924, which is a continuation in port of the common subject matter.

These and other objects will be aoparcnt ii l i t 0 description and drawings 0 the ina :lonning a part of the specification, Elllg understood that the invention may be embodied in other forms and other mechanisms than shown and described. Such modifications and alterations as fall within the scope of the-invention as set forth in the appended claims, areintended to he covered herein.

In the drawings which illustrate one 101111 oi the invention,

Fig. 1 is a front elevation of the core in cou iplcte or circular condition. i Fig. 2 is a horizontal section on theline 22 of Fig.1. 1 r

Fig. 3 is a vertical section on the line of Fig. 1. l l l i Fig. 4 is a view similar to Fig. 3 but showing the first movement in thewcollapsing operation. l i Fig. 5 a detail section on the line 'fi5 of Fig. 1. l v i The core may be divided intoeny number of sections as may he found desirable; In the drawing, it is divided into a key section 1, which is mounted independently of the other section and three sections 2,3 and 4, which constitute the balance of thecoi'e and which .are hinged together, the section d being a central or fixed section ,and the sections 2 and 3 being hinged sections, the key section fitting between the ends of the hinged sections to complete the. core when in circular condition. l l

The shaft for supporting the core is indicated by the numeral 5 and to the outer end of the shaft is keyed the Illtllll supporting plate At the outer end of the supporting plate is mounted a hinge pin 7, which ])nS-iL-Stil1l()1'lgll ears 8 foflned on the interior of an are shaped plate 9 which is attache-1i to the inner nerioherv of the key section 1. Lugs 10 are formed on the supporting plate 6 andon theeors 8 are pro vided stops 11 which cont-act the ln s 10 and halt the swinging movement o the hey section so that it is located in vei tical position as indicatcdin F lg. 3. The Ilicy section is, however, free to sw'ingoutwa d l r in the collapsing of the cove until it is fli'eed from the tire, whereupon it will swing back to its Vertical position. l l 1 'lhei'emaining cone sections 2, .3 aud t are hinged together andniove as a group or unit. For this purposothere is attached to the central 01' fixed section 4 on are shaped bracket 12 from which extend, in the facing, parallel grooves or slideu'ays lVrllQll slide upon curved parallel rails or guides 16 formed as a part of the supper ting plate 6. It will be seen that it the core sections 2, 3 and t are allowed to move as a group or unit upon the guideways 16, the section 4 Will approach the core shaft 5 and the Whole group will ssume a position in a plane intersecting with the original core plane, and that the hey section 1 Will suing outwardly until it is free of the tire and then rcassume its vertical position.

One of the brackets, shown as ll, is provided with an arc shapco rack 17 above the groove 15, and with the rack is meshed a pinion 18 rotatably mounted in the trout oi the supporting plate, formed with a squared extension 19 for operat o' Wrench. The pinion may be ut raising or lowering the group of tions, although by turning the proper position, the force of gravity w. perform this operation. I s ring held pawl or dog 20 may engage the pinion for preventing accidental collapsing of the core.

The sections 2 and 3 are hinged to the central or fixed section t so that they can moved inwardly after the core has been collapsed into the position shown in Fig. a. For this purpose any type of hinge may be used, but in the present invention, I prefer to make use of the oblique or angled hinge. The hinges between the sections are indicated at 21 and 22, and, as shown in Fig. 2 are obliquely arranged with respect to the core plane so that the same time that they are swinging inwardly or toward the center of the core, they are swinging outwardly to clear the core section. In the present invention. the hinge 22 is arranged at a greater angle to the core plane than the hinge 21 so that the section 2 swings outwardly to a greater extent than the section ll. lly this construction the-section 3 Will pass beyond the section at, and the section 2 will clear both of said sections.

lft will be seen that I have provided a simple and easily operated collapsible core which Will collapse into an exceedingly small diameter to permit the removal of the tire. The claims appended hereto are in tended to cover the invention as broadly permitted by the state of the prior art and cover such modifications and alterations Wouldbe suggested to those skilled in tl art.

It will be understood that the invention may be applied to all tire building :t'orms,

whether 01 the rounded core shape or not and the claims are not necessarily limited to the exact shape of the core. lVhere the term core is used througl'iout the specification and claims it Will be understood that form is the equivalent thereot.

hat is claimed is:

1. A. collapsible core comprising a central supporting plate, a plurality of sections constituting the core, one oi": the sections being hinged to the said plate, the remaining sections being hingedly connected $05 1 a group, a guiding formation on the central plate, curving out *ardly from the core plane and means carried by the group o'l? sections to engage said formation, whereby the 'oup ot core sections may he UMP/Ml to position intersecting the original core plane.

it collapsible term comprisin a form section, a curved arm attached t :o the form section and projecting toward tie axis of the term, means to support the arm for sliding movement and intermediate "form sections carried by the first named torni section.

3. is. collapsible core comprising a core section, a. curved arm attached to the core section and projecting toward the axis of the core, means to support the arm for sliding inovei'n-ent and a second core section ried by the first named core section.

4. A collapsible core COllSclllCllOll embodying a supporting plate, a guiding formation upon the plate, a curved arm having sliding engagement with the plate, a core section carried upon the arm, a second core section carried upon the plate and hinged core sections lying between the ends oi the aforen entioned sections.

5. A collapsible core construct" bodying a supporting plate, a guit 1.. iua'tion upon the plate, a cumuul arm l ariruj sliding engagement with the plate, a core n carried upon the arm, a second core section carried upon the plate, and pivolrlly mounted core sections lying between the ends oil the atorementioncd r illn ss of the pivots being angularly arr: i a l with respect to the core plane.

(3.111 a collapsible core construction, a rigid section and a swinging section hinged to each end of the rigid. section, the axes it the hinges being inclined in the same direction relative to the plane of the core but to different predetermined angular extents.

orro J. KUHLKE. 

